u.s. lawmakers and diplomats got involved on hammer's behalf and convinced mexican authorities to release him. >>> we'll talk more than in a moment. first a serious subject. this hour we take a tough look at the gun control debate and how much mental health may play a role, and if we can identify the next shooter before he takes a shot. first, we'd like to take a moment. a reminder of what is at stake here. today marked the final three funerals of the victims of the newtown, connecticut, shooting, and we've already buried six educators and 17 children. people stolen from their friends, from their family, from all of us. this is ana grace marquez, marquez-greene who loved to count and sing. josephine grace gay, who just celebrated her seventh birthday, and emilie alice parker, who was bright, creative and very loving. so let's have a conversation. it will probably make you angry. now, being angry is not a bad thing. it means this matters to you. gun control, in fact, that phrase alone may e